<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <div id="app">
        <!-- vue2   v-for  v-if不建议同时使用 (v-for的优先级比较高, v-if的次数和循环的数据有关, 影响性能) -->
        <!-- v-for   v-if -->
        <ul>
            <li v-for="item in newArr">
                {{ item }}
            </li>
        </ul>
    </div>

    <script src="./vue.min.js"></script>
    <script>
         new Vue({
            el: "#app",
            data: {
                arr: [1, 2, 3, 4, 5, 6, 7, 8]
            },
            computed: {
               newArr() {
                    return this.arr.filter(item => item > 3)
               }
            }      
        })
    </script>
</body>
</html>